Year	Number of
1990	1037.4
1991	1063.69
1992	1092.14
1993	1121.53
1994	1150.63
1995	1179.02
1996	1255.87
1997	1333.71
1998	1416.43
1999	1505.45
2000	1602.26
2001	1642.29
2002	1691.65
2003	1742.79
2004	1795.74
2005	1850.41
2006	1912.3
2007	1977.8
2008	2047.92
2009	2123.08
2010	2204.37
2011	2244.11
2012	2287.22
2013	2334.22
2014	2383.57
2015	2434.46
2016	2466.1